Protection of even the most radical, pseudoscientific, and irrational ideas is necessary to prevent the distortion of truth. Hunting White Supremacists in the Academy “Come, ye philosophers, who cry, ‘All’s well,’ / And contemplate this ruin of a world.” So wrote Voltaire in his poem on the 1755 Lisbon earthquake, which destroyed the city and claimed the lives of up to one-fifth of its population. The disaster, which occurred on All Saints’ Day, ruined the faith of many, and shocked the European mind. It became an occasion for critiquing the philosophical optimism of Leibniz, Pope, and other thinkers of the...